Javascript and W3C validity?

I have the impression that the use of javascript often breaks W3C xhtml/css validity. Is this true? If so, why and is there a way for me to use javascript in my webpages and still开发者_StackOverflow中文版 have them be W3C valid (html, xhtml, css)?

If you wrap your javascript in a //<![CDATA[ tag it will validate

https://developer.mozilla.org/en/properly_using_css_and_javascript_in_xhtml_documents

The answer of your question is yes. To avoid this read this link http://www.htmlhelp.com/tools/validator/problems.html#script